/*
*  Copyright Beijing 58 Information Technology Co.,Ltd.
*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you under the Apache License, Version 2.0 (the
*  "License"); you may not use this file except in compliance
*  with the License.  You may obtain a copy of the License at
*
*        http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing,
*  software distributed under the License is distributed on an
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
*  KIND, either express or implied.  See the License for the
*  specific language governing permissions and limitations
*  under the License.
*/

package lemon.mvc.spring;

import javax.servlet.http.HttpServletRequest;

/**
 * @author lemon
 */
public class HttpUtils {

    /**
     * Part of HTTP content type header.
     */
    public static final String MULTIPART = "multipart/";

    /**
     * Utility method that determines whether the currentRequest contains multipart
     * content.
     *
     * @param request The servlet currentRequest to be evaluated. Must be non-null.
     *
     * @return <code>true</code> if the currentRequest is multipart;
     *         <code>false</code> otherwise.
     *         
     * @author Sean C. Sullivan
     */
    public static final boolean isMultipartContent(HttpServletRequest request) {
        if (!"post".equals(request.getMethod().toLowerCase())) {
            return false;
        }
        String contentType = request.getContentType();
        if (contentType == null) {
            return false;
        }
        if (contentType.toLowerCase().startsWith(MULTIPART)) {
            return true;
        }
        return false;
    }
}
